Syringe



W. F. WARE. SYRINGE (No Model.)

No. 504,764. Patented Sept 12, 1893.

i, UHFD Srnrss PATENT Gaston,

WALTER F. \VARE, OF CAMDEN, NEW JERSEY.

SYRlNGE,

SPECIFICATION forming part of Letters Patent No. 504,764, dated September 12, 1893.

Application filed December 19, 1892. Serial No. 455.575- (llo model.)

To all whom it may concern.-

Be it known that I, IVALTER F. W'ARE, of the city of Camden, State of New Jersey, have invented certain new and useful Improvements in Syringes; andl do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming part of this specification.

My invention has relation to syringes, and consists in the novel construction of pistonpacking and adjustable sliding collar or cork provided on the outside of the barrel for securing the barrel firmly at any desired position in a bottle containing the fluid to be used.

I am aware that rubber has been heretofore employed in different constructions for piston-packin gs, and that sliding cylindrical collars have been known in other constructions for difierentpurposes, and I do not claim such devices broadly, my invention residing in the specific constructions herein particularly described and claimed.

In the accompanying drawings, in which similar letters of reference refer to similar parts throughout-Figure l is a perspective view of a syringe having my improvement provided thereon. Fig. 2 is a longitudinal sectional view of the syringe shown in Fig. 1.

The object of my invention is to provide an efficient, durable, and at the same time, inexpensive and easily adjustable piston-packing, which occupies but little space in the barrel, and which, when fully elevated, will impinge against the inner surface of the cap of the barrel and allow the full area, approximately, of the barrel to be charged with the liquid, and, by which, as in the construction shown in the drawings, the total contents will be discharged when the piston is fully depressed.

A further object is to provide an efficient and readily adjustable construction for retaining the syringe in any desired position in a corked bottle.

A represents the barrel of the syringe provided with the cap, 0, and nozzle, a, either integral with the barrel, A, or preferably of rubber, as shown in the drawings, secured to the end of the barrel. The lower end of the piston, P, is provided with a disk, 1), of a diame ter somewhat less than the interior of the diameter of the barrel, A.

Upon the disk, p, I provide the rubber cupshaped packing, B, of the construction illustrated in the drawings, consisting of a lower ring or disk, b, having integrally provided thereon the upwardly projecting circumfer ential ring, I), and flanges, b inwardly projecting from the ring, I), constructed to engage around the disk, 19, of the piston, P, and to firmly hold the packing in position, readily adjustable upon the disk 19, and yet without liability to displacement. It will thus be readily seen that by this construction I provide the greater portion of the piston-headin cross section of a solid non-yielding material, 19, while the balance of the diameter in crosssection and parts in contact with the inner surface of the barrel are of a partially yielding expansive material integral with the lower exposed facing, 79, and with the inwardly deflecting securing flanges, 6 This construction of partially solid and partially yielding material, composing the piston-head, will in practical operation retain substantially a rigid position at right angles to the walls of the barrel, and produce an effective air-tightconnection with the inner surface of the barrel.

The adjustable partially cone-shaped rubber collar, D, is provided with an orifice, d, longitudinallythrough its center of a diameter slightly less than the exterior diameter of the barrel, B, in cross-section, so that the collar, D, may be tightly fitted upon the barrel, A, yet at the same time be readily adjustable thereon. The collar or cork, D, is partially cone-shaped so as to tightly fit in the mouths of bottles of different sizes. If the syringe is adjusted into a comparatively short bottle, the stopper, D, is lowered upon the said barrel, A, and in the case of a longer bottle the stopper is raised so that it will occupy substantially the position shown in the drawings.

Having thus described my invention, what I claim, and desire to secure by Letters Patcut, is

1. In a syringe, the combination of the barrel, the piston provided with a disk at its lower end, a rubber cup incasing said disk and having an inwardly projecting flange engaging on the inner side of said disk around nozzle, a piston in the barrel, an inherently said piston rod, substantially as described. elastic conical stopper, D, surrounding the 2. The combination in a syringe, of a barbarrel and adjustable longitudinally thereon i 5 rel, a cap, a nozzle, a piston rod, a disk on the whereby the syringe may be adapted to bot- 5 lower end thereof, and a cuplike body of yieldties of dilferent size,substantially as described.

ing material having a lower bottom portion In witness whereof I have hereunto set my extending entirely over the lower surface of hand this 17th day of December, A. D. 1892. the disk the rin portion surroundin the y piston, and the irTwardly projecting anr lular WALTER 1o flange portion extending partlyover the upper Witnesses:

surface of the disk, substantially as specified. JAMES M. CASSADY, 3. The combination of the barrel, a cap, a HORACE PETTIT. 

